<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>动画</title>
    <style>
        div {
            width: 100px;
            height: 100px;
            background-color: red;
            position: relative;
            animation-name: example;
            animation-duration: 4s;/*播放时间*/
            animation-iteration-count: infinite;/*播放次数，infinite无限播放*/
        }

        @keyframes example {
            0%   {background-color:red; left:0px; top:0px;}
            25%  {background-color:yellow; left:200px; top:0px;}
            50%  {background-color:blue; left:200px; top:200px;}
            75%  {background-color:green; left:0px; top:200px;}
            100% {background-color:red; left:0px; top:0px;}
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>